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Re: VaraFM Gateway News
Thanks, I've been trying to connect, but it's too far for me here. Just breaks squelch. Link study from my QTH attached. On Fri, Feb 23, 2024 at 9:14?PM W0AYE Ben Wussow <w0aye.mn@...> wrote: For those interested, the W0AYE-10 VaraFM gateway is now installed in the amateur radio room at the Kandiyohi County EOC located in Willmar. The gateways' antenna is an omni directional vertical on top of the EOC's 60' tower. The gateway radio is a Yaesu FTM-6000 using a Digirig soundcard running 25w. I have changed the gateway frequency to 145.070 MHz to stay inline with other emcomm Winlink frequencies in Minnesota.? |
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VaraFM Gateway News
For those interested, the W0AYE-10 VaraFM gateway is now installed in the amateur radio room at the Kandiyohi County EOC located in Willmar. The gateways' antenna is an omni directional vertical on top of the EOC's 60' tower. The gateway radio is a Yaesu FTM-6000 using a Digirig soundcard running 25w. I have changed the gateway frequency to 145.070 MHz to stay inline with other emcomm Winlink frequencies in Minnesota.?
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Willmar Area Emergency Amateur Radio Club Constitution and By-Laws
Willmar Area Emergency Amateur Radio Club Constitution, By-Laws and
Membership Fees |
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Layman's explanation of VARA
VARA - How it works in layman's terms.
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Most amateur digital discussions these days will come around to talking about the VARA mode by EA5HVK.
VARA has been in development for many years and is now a mature format used by many Hams around the world.
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What "it" is - VARA is a audio modem that sends and receives tones over the air which convey data.
VARA continuosly adjusts the data level to match conditions, getting the most out of the path between the stations.
It is one of the fastest methods in both HF and VHF/UHF communications via voice radios to date.
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Perhaps the simplest way to explain would be to compare to something you can visulize like a orchestra.
Most amateur modulation methods are single tone at a time, like a single instrument playing away.
VARA is like the whole orchestra playing with the ability to hear each instrument individually.
VARA HF uses from 2 to 58 different tones called carriers.? VARA-FM uses 14 to 116 carriers.
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At this point, we owe a debt to mathmatical wizards who theorized if tones could be produced with enough accuracy
and carefully chosen to be mathmatically orthogonal, these tones would not interfere with each other when played at the same time. No filters, just math.
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Like any modem, VARA is meant to be used by another application to communicate.
For example, Winlink which is essentially an email program with several options for delivery, including using VARA.
Reminicant of the dial up Internet days, if the user wishes to send or check their email on Winlink, they open a modem program.
From there, it's up to the user to choose and connect to a gateway station, then exchange email.
73's Mike N0QBH |
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Slide show of all things VARA
Answers a lot of questions a potential user might have about using VARA software modems.
https://www.k7yca.org/wp-content/uploads/2021/03/VARA-Rev-9.pdf |
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Re: Updated WILMAR tower info
Ya 150-164 mhz,? not a db 224 though but a db 616ab.? On Mon, Feb 12, 2024, 08:01 N0QBH Mike Berg <mikeberg@...> wrote: Are you referring to the unconnected cable in the exiting bundle photo? |
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Re: Updated WILMAR tower info
Are you referring to the unconnected cable in the exiting bundle photo?
We noticed it was marked as high SWR. Maybe it's business band VHF. |
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Re: Updated WILMAR tower info
This is the antenna up there for both digi and 440. It's either a 5.5 db or 5.0 db version. Pointed East. There is an unused antenna up there but does not tune well in ham band 2 meter? On Sun, Feb 11, 2024, 14:02 N0QBH Mike Berg <mikeberg@...> wrote:
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Updated WILMAR tower info
Tony WD0HXV and I N0QBH were out to the HHS tower site again today and this time we did a little more sleuthing regarding the feedline to the tower top 400' up.
Much to our delight, we discovered the 1/2' hardline in the transmitter building from the the Club's 444.800 repeater and the 145.670 WILMAR packet node transitioned to 7/8" diameter as it left the building. This means it has much less line loss than we originally thought! 73 Mike N0QBH |
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Re: Welcome to the local 145.690 Winlink network
There are radios with built in soundcards like the Yaesu FT-991A, Icom IC-7100 and Icom IC-9700 that do not require the use of an external soundcard. These radios are good examples of do-it-all radios that only use one cable for DATA modes. I'm sure there are more radios out there that have internal soundcards, but these are the ones that I know of.?
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Welcome to the local 145.690 Winlink network
Tony WD0HXV has joined the local Winlink network! It's built around the Winlink Gateway W0AYE-10 run by Ben W0AYE. |
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Re: The Case for APRS
Agreed, however, that's a lot of $$ to keep an unused packet node on frequency.?
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Re: 147.030 repeater
开云体育Interesting,?I have a set of WACOM 643 6 cavity VHF duplexer, that needs to be refurbished, the rods got bent during shipping, I think they threw a heavy box on top of them when it was shipped, I also have a VHF and UHF MSR-5000's in my garage. I shite-load
of GE Mastr II stuff, including some Low-Band stuff that could be tweaked to build a Split-Site 10 meter repeater.
I have been debating about getting back on, but I really haven't made that decision yet.
73 de RR.
-------- Original message --------
From: N0QBH Mike Berg <mikeberg@...>
Date: 2/4/24 19:44 (GMT-06:00)
Subject: Re: [W0SW] 147.030 repeater
This time it was off for 3 weeks or so.
Thanks for the detailed info on the repeater itself. Believe me, that was hard to come by in the past. Since an earlier discussion was on cavity duplexers, one option would be to add a set to the .03 on one or the other antenna and free up the remaining one for another 2m use. Just thinking out of the box. 73 'QBH -- 73 de Randy, WR0RR. (Ex: KA0UYL and N0GMX) |
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Re: 147.030 repeater
Yes, you figured it out. It took me quite a while to trace a lot of those lines there, some of the height labels don't match up with the spread sheet there totally either. But there are some empty biz antennas out at that site as well as the Q tower. I put an antenna analyzer on them. None work with the ham bands. On Sun, Feb 4, 2024 at 7:50?PM N0QBH Mike Berg <mikeberg@...> wrote: Belay my last. Looking at the photo tells me that would only work on the lower antenna. The upper is a 450 MHz (listen only). |
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Re: 147.030 repeater
Belay my last. Looking at the photo tells me that would only work on the lower antenna. The upper is a 450 MHz (listen only).
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Re: 147.030 repeater
This time it was off for 3 weeks or so.
Thanks for the detailed info on the repeater itself. Believe me, that was hard to come by in the past. Since an earlier discussion was on cavity duplexers, one option would be to add a set to the .03 on one or the other antenna and free up the remaining one for another 2m use. Just thinking out of the box. 73 'QBH |
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Re: 147.030 repeater
How far back ar you remembering it being offline Mike?? A couple summers ago it was off due to the Air conditioning not working and the repeater locked up. I happened to be in Willmar and checked on it then, and that's all it was. Other than that I had not heard of any problems, sometimes the slot cards need to be reseated as well. Also at the KWLM station tower the Rx antenna for the 147.03 comes off a
VHF/UHF splitter and into a bandpass filter from the UHF trunk system
antenna at 460 ft. ?(Not sure but believe it is a 450 mhz
antenna it is listed as a 20 ft Dipole antenna The Tx is on its own
antenna at 392 ft. (Former 91 site
) Dan - KC0CAP On Sun, Feb 4, 2024 at 6:15?PM N0QBH Mike Berg <mikeberg@...> wrote: I noticed the 147.03 Willmar repeater is back on.? |